Configuring Power over Ethernet

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Information About Configuring Power over Ethernet

When an access point that has been converted to lightweight mode (such as an AP1262) access point is powered by a power injector that is connected to a Cisco pre-Intelligent Power Management (pre-IPM) switch, you must configure Power over Ethernet (PoE), which is also known as inline power.

How to Configure Power over Ethernet

Configuring Power over Ethernet (CLI)

SUMMARY STEPS

1.apnameCisco_APpowerinjectorinstalled

2.apnameCisco_APpowerinjectoroverride

3.apnameCisco_APpowerinjectorswitch-mac-addressswitch_mac_address

4.showapnameCisco_APconfiggeneral

DETAILED STEPS

Command or Action

Purpose

Step 1

apnameCisco_APpowerinjectorinstalled

Example:

Controller# ap name AP02 power injector installed

Enables the PoE power injector state. The access point remembers that a power injector is connected to this particular switch port. If you relocate the access point, you must reenter this command after the presence of a new power injector is verified.

Note

Enter this command if your network contains any older Cisco 6-W switches that could be accidentally overloaded if connected directly to a 12-W access point. Make sure that the Cisco Discovery Protocol (CDP) is enabled before entering this command. Otherwise, this command will fail.

Step 2

apnameCisco_APpowerinjectoroverride

Example:

Controller# ap name AP02 power injector override

Removes the safety checks and allows the access point to be connected to any switch port. You can use this command if your network does not contain any older Cisco 6-W switches that could be overloaded if connected directly to a 12-W access point. The access point assumes that a power injector is always connected. If you relocate the access point, it continues to assume that a power injector is present.

Enter this command if you know the MAC address of the connected switch port and do not want to automatically detect it using the installed option.

Step 4

showapnameCisco_APconfiggeneral

Example:

Controller# show ap name AP02 config general

Displays common information that includes the PoE settings for a specific access point.

Note

The Power Type/Mode text box shows “degraded mode” if the access point is not operating at full power.

Configuring Power
over Ethernet (GUI)

Step 1

Choose
Configuration > Wireless > Access
Points > All APs.

The
All APs page appears with a list of access
points that are associated with the
controller.

Step 2

Click the name
of the access point.

The
AP > Edit page appears.

Step 3

Click the
Advanced tab.

Step 4

In the
Power Over Ethernet Settings area, select the
Pre-Standard 802.3af Switches check box.

Select this
check box if the access point is being powered by a high-power 802.3af Cisco
switch. This switch provides more than the traditional 6 Watts of power but
does not support the intelligent power management (IPM) feature.

Note

Unselect the
Pre-standard 802.3af Switches check box if
power is being provided by a power injector. This is the default value.

Step 5

Select the
Power Injector State check box.

Select this
check box if the attached switch does not support IPM and a power injector is
being used. If the attached switch supports IPM, you do not need to select this
check box.

The
Power Injector Selection drop-down list is
displayed that contains parameters that enable you to protect your switch port
from an accidental overload if the power injector is inadvertently bypassed.

Step 6

From the
Power Injector Selection drop-down list,
choose an option to specify the desired level of protection.

You can choose
any one of the following three options:

Installed—Examines and remembers the MAC address
of the currently connected switch port and assumes that a power injector is
connected. Choose this option if your network contains older Cisco 6-Watt
switches and you want to avoid possible overloads by forcing a double-check of
any relocated access points.

If you want
to configure the switch MAC address, enter the MAC address in the
Injector Switch MAC Address text box. If
you want the access point to find the switch MAC address, leave the
Injector Switch MAC Address text box
blank.

Note

Each time
that an access point is relocated, the MAC address of the new switch port fails
to match the remembered MAC address, and the access point remains in low-power
mode. You must then physically verify the existence of a power injector and
reselect this option to cause the new MAC address to be remembered.

Override—Allows the access point to operate in
high-power mode without first verifying a matching MAC address. You can use
this option if your network does not contain any older Cisco 6-W switches that
could be overloaded if connected directly to a 12-W access point. The advantage
of this option is that if you relocate the access point, it continues to
operate in high-power mode without any further configuration. The disadvantage
of this option is that if the access point is connected directly to a 6-W
switch, an overload occurs.

Step 7

Click
Apply.

Step 8

Click
Save Configuration.

What to Do Next

Manually reset the
access point in order for the change to take effect.

Configuration Examples for Configuring Power over Ethernet

Displaying Power over Ethernet Information: Example

This example shows how to display common information that includes the PoE settings for a specific access point: